diff mbox series

[bpf-next,v3,5/5] selftests/bpf: Add test for narrow spill into 64-bit spilled scalar

Message ID 20241202083814.1888784-6-memxor@gmail.com (mailing list archive)
State New
Delegated to: BPF
Headers show
Series Fixes for stack with allow_ptr_leaks | expand

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Commit Message

Kumar Kartikeya Dwivedi Dec. 2, 2024, 8:38 a.m. UTC 
Add a test case to verify that without CAP_PERFMON, the test now
succeeds instead of failing due to a verification error.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
 .../selftests/bpf/progs/verifier_spill_fill.c    | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/progs/verifier_spill_fill.c b/tools/testing/selftests/bpf/progs/verifier_spill_fill.c
index f5cd21326811..83b5cd705ccd 100644
--- a/tools/testing/selftests/bpf/progs/verifier_spill_fill.c
+++ b/tools/testing/selftests/bpf/progs/verifier_spill_fill.c
@@ -1261,4 +1261,20 @@  __naked void stack_noperfmon_reject_invalid_read(void)
 "	::: __clobber_all);
 }
 
+SEC("socket")
+__description("stack_noperfmon: narrow spill onto 64-bit scalar spilled slots")
+__success __success_unpriv
+__caps_unpriv(CAP_BPF)
+__naked void stack_noperfmon_spill_32bit_onto_64bit_slot(void)
+{
+	asm volatile("					\
+	r0 = 0;						\
+	*(u64 *)(r10 - 8) = r0;				\
+	*(u32 *)(r10 - 8) = r0;				\
+	exit;						\
+"	:
+	:
+	: __clobber_all);
+}
+
 char _license[] SEC("license") = "GPL";